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119 lines
2.2 KiB
119 lines
2.2 KiB
use super::*;
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use std::iter::FromIterator;
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#[cfg(nightly)] type ListAbs<T> = std::collections::LinkedList<T>;
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#[cfg(not(nightly))] type ListAbs<T> = Vec<T>;
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#[derive(Debug)]
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pub struct TaskList {
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list: ListAbs<(usize, String)>,
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buffer: String,
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index: usize,
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}
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fn find<T,F>(list: &ListAbs<T>, mut fun: F) -> Option<usize>
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where F: FnMut(&T) -> bool
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{
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for (i,x) in (0..).zip(list.iter())
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{
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if fun(x) {
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return Some(i);
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}
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}
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None
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}
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impl TaskList
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{
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/// Create a new tasklist
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pub fn new() -> Self
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{
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Self {
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list: ListAbs::new(),
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buffer: String::new(),
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index: 0,
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}
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}
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/// Number of tasks in the list
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pub fn len(&self) -> usize
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{
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self.list.len()
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}
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/// Push a new task string, and return its ID.
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pub fn push(&mut self, string: impl Into<String>) -> usize
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{
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let idx = {
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self.index+=1;
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self.index
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};
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#[cfg(nightly)] self.list.push_back((idx,string.into()));
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#[cfg(not(nightly))] self.list.push((idx,string.into()));
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self.recalc();
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idx
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}
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/// Pop a task off the string, returns `true` if successful, `false` if wasn't found.
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pub fn pop(&mut self, idx: usize) -> bool
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{
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if let Some(idx) = find(&self.list, |&(i, _)| idx == i)
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{
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self.list.remove(idx);
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self.recalc();
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true
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} else {
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false
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}
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}
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/// Clear the `TaskList`
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pub fn clear(&mut self)
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{
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self.list.clear();
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self.buffer = String::default();
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}
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/// As a single `str`
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pub fn as_str(&self) -> &str
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{
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&self.buffer[..]
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}
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fn recalc(&mut self)
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{
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#[cfg(nightly)] {
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self.buffer = self.list.iter().map(|(_, s)| s.as_str()).join(", ");
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}
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#[cfg(not(nightly))] {
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self.buffer = self.list.iter().map(|(_, s)| s.as_str()).join(", ");
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}
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}
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}
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impl AsRef<str> for TaskList
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{
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#[inline] fn as_ref(&self) -> &str
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{
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self.as_str()
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}
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}
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impl<T> FromIterator<T> for TaskList
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where T: Into<String>
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{
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fn from_iter<I: IntoIterator<Item=T>>(iter: I) -> Self
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{
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let mut i=0usize;
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let mut this = Self {
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list: iter.into_iter().map(|x| ((i, x.into()), i+=1).0).collect(),
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buffer: Default::default(),
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index: 0,
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};
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this.index = i;
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this.recalc();
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this
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}
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}
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